JPH07254424A - Collector plate for molten carbonate fuel cell - Google Patents
Collector plate for molten carbonate fuel cellInfo
- Publication number
- JPH07254424A JPH07254424A JP6044600A JP4460094A JPH07254424A JP H07254424 A JPH07254424 A JP H07254424A JP 6044600 A JP6044600 A JP 6044600A JP 4460094 A JP4460094 A JP 4460094A JP H07254424 A JPH07254424 A JP H07254424A
- Authority
- JP
- Japan
- Prior art keywords
- current collector
- collector plate
- fuel cell
- cathode
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
- H01M8/0254—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/023—Porous and characterised by the material
- H01M8/0232—Metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/14—Fuel cells with fused electrolytes
- H01M2008/147—Fuel cells with molten carbonates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0048—Molten electrolytes used at high temperature
- H01M2300/0051—Carbonates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、炭酸塩マトリックスを
アノード（燃料極）とカソード（空気極）とで挟んだ単
電池と、そのアノードに燃料ガスを、カソードに酸化剤
ガスをそれぞれ隔てて導くセパレータを交互に積層した
溶融炭酸塩型燃料電池の集電板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit cell in which a carbonate matrix is sandwiched between an anode (fuel electrode) and a cathode (air electrode), and a fuel gas is provided at the anode and an oxidant gas is provided at the cathode. The present invention relates to a current collector plate of a molten carbonate fuel cell in which leading separators are alternately laminated.
【０００２】[0002]
【従来の技術】燃料電池は電極上で生じる電気化学的反
応を直接電気出力に変換する発電方式であり、この反応
を行わせるには燃料ガスと酸化剤ガスとを、電解質マト
リックスを挟んで向き合うアノードとカソードとにそれ
ぞれ分けて供給しなければならない。この目的でアノー
ド、およびカソードからなる単電池を複数個積層して積
層型燃料電池を構成する場合に、燃料ガスと酸化剤ガス
の流路を形成するセパレータが介装される。2. Description of the Related Art A fuel cell is a power generation system in which an electrochemical reaction occurring on an electrode is directly converted into an electric output. In order to carry out this reaction, a fuel gas and an oxidant gas face each other with an electrolyte matrix interposed therebetween. It must be supplied separately to the anode and the cathode. For this purpose, when a plurality of unit cells including an anode and a cathode are stacked to form a stacked fuel cell, a separator that forms a flow path for fuel gas and oxidant gas is interposed.
【０００３】セパレータは単電池同士を電気的に直列に
接続する機能を要し、この目的でセパレータの内部には
単電池と密着して電気を導く集電板を有する。集電板は
ガス流路空間を確保するための構造物の機能も併せも
つ。The separator needs to have a function of electrically connecting the cells to each other in series, and for this purpose, the separator has a current collector plate in close contact with the cells to guide electricity. The collector plate also has a function of a structure for securing a gas flow passage space.
【０００４】電解質として溶融炭酸塩を用いた燃料電池
は溶融炭酸塩型燃料電池と呼ばれ、マトリックスには炭
酸塩が含浸される。炭酸塩型燃料電池の一例を１セルだ
け抜き出して図７に示す。また、そのＡ−Ａ断面を２セ
ル積層したものを図８に示す。単電池１は電解質マトリ
ックス２と、その両面に密着して配置されるアノード３
およびカソード４とから構成されている。また、セパレ
ータ５は金属製で、インターコネクタ６、アノードエッ
ジ板７、カソードエッジ板８、アノード集電板９、カソ
ード集電板10からなり、単電池に密着して配設され、ア
ノードに燃料ガス11を、カソードに酸化剤ガス12を導
く。アノード３とカソード４を電極と呼ぶ。A fuel cell using molten carbonate as an electrolyte is called a molten carbonate fuel cell, and a carbonate is impregnated in a matrix. An example of a carbonate fuel cell is shown in FIG. Further, FIG. 8 shows the AA cross section in which two cells are laminated. The unit cell 1 is composed of an electrolyte matrix 2 and an anode 3 which is closely attached to both surfaces of the electrolyte matrix 2.
And a cathode 4. The separator 5 is made of metal and includes an interconnector 6, an anode edge plate 7, a cathode edge plate 8, an anode current collector plate 9, and a cathode current collector plate 10. The gas 11 and the oxidant gas 12 are introduced to the cathode. The anode 3 and the cathode 4 are called electrodes.
【０００５】ところで、インターコネクタ６は燃料ガス
11と酸化剤ガス12とを隔て、双方のエッジ板７、８とと
もにそれぞれのガス流路を形成するものであって、双方
の集電板９、10は単電池１に発生する電気を単電池の外
へ均一に導くとともに、単電池を均等な力で支持し、ガ
ス流路を確保する。By the way, the interconnector 6 is a fuel gas.
11 and the oxidant gas 12 are separated from each other to form respective gas flow paths together with both edge plates 7 and 8, and both current collector plates 9 and 10 generate electricity for the unit cell 1 by a unit cell. The gas flow path is ensured by uniformly guiding the cells to the outside and supporting the cells with an even force.
【０００６】燃料ガス11と酸化剤ガス12とは、マニホー
ルドからアノードとカソードとにそれぞれ供給される
が、マニホールドは隣接する上下のセパレータ同士をマ
ニホールドリング13で接続されて構成されている。The fuel gas 11 and the oxidant gas 12 are supplied from the manifold to the anode and the cathode, respectively. The manifold is constructed by connecting adjacent upper and lower separators with a manifold ring 13.
【０００７】[0007]
【発明が解決しようとする課題】上記したように、単電
池は、アノード集電板９、インターコネクタ６およびカ
ソード集電板10を介して電気的に接続されていることに
なるが、これらの部品の接触抵抗は電池の出力のいくら
かを失うことになり、電気接触部を最小限にする必要が
ある。そのために集電板は一体成形され、接触抵抗を抑
える工夫が成されている。図９にインターコネクタ６を
挟む、アノード集電板９とカソード集電板10との構成の
従来例を示す。これらの集電板は、剪断絞り加工と剪断
打ち抜き加工が施された一枚の薄板から成形されてい
る。As described above, the unit cells are electrically connected through the anode current collector 9, the interconnector 6 and the cathode current collector 10. The contact resistance of the components will result in some loss of battery power, and electrical contacts must be minimized. For this reason, the current collector plate is integrally molded, and measures are taken to suppress the contact resistance. FIG. 9 shows a conventional example of the configuration of the anode current collector 9 and the cathode current collector 10 with the interconnector 6 interposed therebetween. These current collector plates are formed from a single thin plate that has been subjected to shear drawing and shear punching.
【０００８】ところが、集電板に密着する電極は多孔質
体であり、圧縮力によりその気孔が潰れる可能性があ
る。そこで、電極を支持する集電板は、より平坦で開口
部は小さいことが望ましい。図９に示す集電板は脚14を
成形するため比較的大きい開口部を有する。そのため、
図10に示す通り、開口部に電極が食い込み、電極の気孔
率に局所的なばらつきが生じて、電池性能の低下が起こ
る。However, the electrode that is in close contact with the current collector is a porous body, and its pores may be collapsed by the compressive force. Therefore, it is desirable that the current collector supporting the electrodes be flat and have a small opening. The current collector plate shown in FIG. 9 has a relatively large opening for molding the leg 14. for that reason,
As shown in FIG. 10, the electrode bites into the opening, causing a local variation in the porosity of the electrode, resulting in a decrease in battery performance.
【０００９】また、燃料ガスおよび酸化剤ガスは集電板
で支持された空間を通過して流れるとき、ガスの圧力損
失が生じるが、このような圧力損失は直接動力の損失に
なるので最小限に抑えなければならない。そのために
は、ガス流路の中にある脚14の高さを十分にとり流路断
面積を大きくすることが望ましい。Further, when the fuel gas and the oxidant gas flow through the space supported by the current collector plate, a pressure loss of the gas occurs, but such a pressure loss directly causes a loss of power, so that it is minimal. Must be kept to. For that purpose, it is desirable to make the height of the leg 14 in the gas flow passage sufficiently large to increase the flow passage cross-sectional area.
【００１０】さらに、単電池で発生した電気をより均等
に隣接する単電池に導くために、また、積層した単電池
を支持する脚の構造的強度を大きくするために、流路を
横切る集電板の脚14はより緻密に配置されねばならな
い。しかしながら、同時に、集電板とインターコネクタ
の接触抵抗を小さく抑えるためには、脚14の接触面積を
確保しなければならない。Further, in order to more evenly guide the electricity generated in the unit cells to the adjacent unit cells and to increase the structural strength of the legs supporting the stacked unit cells, a current collector that crosses the flow path is used. The legs 14 of the board must be more closely arranged. However, at the same time, in order to keep the contact resistance between the current collector and the interconnector small, the contact area of the legs 14 must be secured.
【００１１】図９に示す集電板は、脚高を大きくする
と、集電板の開口部の面積が大きくなるため、脚高を大
きくすることが難しく、圧力損失を低減できない。さら
に、脚高を大きくすると、脚を緻密に配置することが難
しく、均等な集電と構造的な強度に問題があった。In the current collector shown in FIG. 9, when the leg height is increased, the area of the opening of the current collector is increased, so that it is difficult to increase the leg height and the pressure loss cannot be reduced. Furthermore, when the leg height is increased, it is difficult to dispose the legs precisely, and there is a problem in uniform current collection and structural strength.
【００１２】そこで、本発明の目的は集電板の脚を緻密
に配置しながら、脚高を大きく保ち、さらに、電極と密
着する面における開口部の面積の小さい集電板を一枚板
より成形した溶融炭酸塩型燃料電池の集電板を提供する
ことを目的とする。Therefore, an object of the present invention is to precisely arrange the legs of the current collector plate while maintaining a large leg height, and further, to reduce the area of the opening on the surface in contact with the electrode from a single plate. An object is to provide a molded collector plate for a molten carbonate fuel cell.
【００１３】[0013]
【課題を解決するための手段】上記した課題を解決する
ための手段を図１を用いて説明する。金属の薄板を波形
状に折り曲げ加工して集電板20を成形することによっ
て、比較的自由に集電板を高くするようにし、波形の各
山の頂部の幅ａを麓部の幅ｂよりも広げるようにした。
電極に密着する面（図中下面）の各山の頂部に平面を形
成し、電極を平面で支持させた。さらに、その平面に薄
板を貫通する小孔を多数設けて、ガスの流通を図った。
また、波形集電板のインターコネクタに接する面（図中
上面）においても、各山の頂部に平面を形成し、インタ
ーコネクタとの密着を良好にした。Means for solving the above problems will be described with reference to FIG. By bending a thin metal plate into a corrugated shape to form the current collector plate 20, the current collector plate can be raised relatively freely, and the width a at the top of each ridge of the corrugations is greater than the width b at the foot. I also tried to spread it.
A flat surface was formed on the top of each peak on the surface (the lower surface in the figure) that is in close contact with the electrode, and the electrode was supported by the flat surface. Furthermore, a large number of small holes penetrating the thin plate were provided on the flat surface to facilitate gas flow.
Further, also on the surface of the corrugated current collector plate in contact with the interconnector (upper surface in the figure), a flat surface was formed at the top of each crest to improve the close contact with the interconnector.
【００１４】電極に密着する面の開口部をより小さくす
るため、電極と密着する面において、隣接する山の頂部
同士を肩部21で接触させて開口部を閉じた。このような
集電板は、波形の下面と上面を流れるガスｃ，ｄが電極
に触れる様相が異なるため、流路を流れるにしたがい組
成等に差異が生じ、電池反応が不均一になり易い。そこ
で、波の位相を一部でオフセットさせるか、波形の山の
脚部22に孔を設けた。In order to make the opening on the surface closely contacting the electrode smaller, the peaks of adjacent peaks are brought into contact with each other at the shoulder 21 on the surface closely contacting the electrode to close the opening. In such a current collector plate, the gas c and d flowing on the lower surface and the upper surface of the corrugation have different appearances in contact with the electrodes, so that the composition or the like is different as the gas flows through the flow path, and the battery reaction is likely to be nonuniform. Therefore, the phase of the wave is partially offset, or a hole is provided in the leg portion 22 of the corrugated peak.
【００１５】[0015]
【作用】集電板を一枚の薄板より成形するにあたり、波
形形状にしたことにより、集電板の高さは比較的に自由
に選択することができた。これにより、集電板を高くし
て、流れるガスの圧力損失を小さくすることができた。
さらに、波形の山頂部の幅を山麓部の幅よりも広くした
ことにより、電極あるいはインターコネクタとの接触面
積を確保しながら、脚部を緻密に配置することができ
た。これにより、集電板への電極の食い込みを抑えると
ともに、接触抵抗の低減と、均一な集電と、十分な構造
的強度を得ることができた。したがって、この集電板を
組み込んだ積層型の燃料電池は性能が向上する。When the current collector plate is formed from a single thin plate, the height of the current collector plate can be relatively freely selected because of the corrugated shape. This made it possible to raise the current collector plate and reduce the pressure loss of the flowing gas.
Furthermore, by making the width of the crest of the corrugation wider than the width of the foot of the corrugation, the legs can be arranged precisely while ensuring the contact area with the electrode or the interconnector. As a result, it was possible to suppress biting of the electrode into the current collector plate, reduce contact resistance, obtain uniform current collection, and obtain sufficient structural strength. Therefore, the performance of the stacked fuel cell incorporating this current collector plate is improved.
【００１６】[0016]
【実施例】本発明の実施例を図を用いて説明する。図１
は本発明の集電板の一実施例の一部の斜視図である。こ
の集電板20は金属製の薄板を折り曲げ加工して、波形に
成形されているが、波形の各山の頂部の幅ａを麓部の幅
ｂよりも広くした。電極が接触する面は平坦にし、小さ
い孔23を多数設けた。集電板に電極が接触するとき、波
形の各谷部は電極に対して、開口部となるが、山頂部の
ａ＞ｂより、開口部を狭くしながら、ａの幅を広く保つ
ことができた。開口部が狭いので、電極は集電板に食い
込み難く、電極の気孔が局部的に潰れることがなかっ
た。また、インターコネクタと接触する面積は広くする
ことができ、接触抵抗を低減することができた。Embodiments of the present invention will be described with reference to the drawings. Figure 1
FIG. 3 is a perspective view of a part of an embodiment of the current collector plate of the present invention. The current collector plate 20 is formed by bending a metal thin plate into a corrugated shape, and the width a at the top of each peak of the corrugation is made wider than the width b at the foot. The surface contacting the electrodes was made flat and a large number of small holes 23 were provided. When the electrode comes into contact with the current collector plate, each valley of the corrugation forms an opening with respect to the electrode, but it is possible to keep the width of a wider while making the opening narrower than a> b at the peak. did it. Since the opening is narrow, it was difficult for the electrode to bite into the current collector plate, and the pores of the electrode were not locally collapsed. Further, the area in contact with the interconnector can be increased, and the contact resistance can be reduced.
【００１７】また、この形状にすると、集電板は比較的
自由に高くすることができ、ガスの圧力損失を抑えるた
めに十分高くすることができた。集電板の全高を2.5 mm
から４mmにして、流路長さ１ｍとしたときに、圧力損失
は30mmAqから300 mmAqであった。この圧力損失は、溶融
炭酸塩型燃料電池の最適なシステム効率を与える。Further, with this shape, the current collector plate can be raised relatively freely, and can be sufficiently raised to suppress the gas pressure loss. Total height of current collector plate is 2.5 mm
The pressure loss was 30 mmAq to 300 mmAq when the flow path length was 1 m from 4 mm. This pressure drop provides optimum system efficiency for the molten carbonate fuel cell.
【００１８】さらに、ａ＞ｂとしたことにより、脚部22
を電極の平面積に対してより緻密に配置することがで
き、単電池間の電流を電極平面内でより均一に導くこと
ができた。また、脚部の緻密な配置は、電極を支持する
集電板の構造的な強度が増し、より均一な圧力で電極を
支持することができる。Further, by setting a> b, the leg portion 22
Was more densely arranged with respect to the plane area of the electrode, and the current between the unit cells could be guided more uniformly in the electrode plane. In addition, the dense arrangement of the legs increases the structural strength of the current collector plate supporting the electrodes, and can support the electrodes with more uniform pressure.
【００１９】孔23は、ガスを電極に導くために必要であ
るが、平面内に小さい孔をより多数設けるためには、丸
孔を三角配列するのが最適であった。このような集電板
は、集電と支持双方の機能を高め、曳いては、溶融炭酸
塩型燃料電池の性能を高めた。The holes 23 are necessary for guiding the gas to the electrodes, but in order to provide a large number of small holes in the plane, it was optimal to arrange the circular holes in a triangular arrangement. Such a current collector plate has enhanced both functions of current collection and support, and in turn has enhanced the performance of the molten carbonate fuel cell.
【００２０】図２に示す集電板25は、図１に示す波形の
集電板のインターコネクタと接触する側の山頂部の幅ｅ
を電極に接触する側の山頂部の幅ｆよりも広くしたこと
に特徴がある。この集電板が電極に接する面の開口部は
より小さくすることができ、電極の食い込みを抑えるこ
とができる。The current collector plate 25 shown in FIG. 2 is the width e of the crest of the corrugated current collector plate shown in FIG. 1 on the side in contact with the interconnector.
Is characterized in that it is made wider than the width f of the peak portion on the side in contact with the electrode. The opening of the surface where the current collector plate contacts the electrode can be made smaller, and the biting of the electrode can be suppressed.
【００２１】図３に示す集電板26では、図２の集電板の
幅ｅをさらに狭くして、集電板が電極に接触する面にお
いて波形の谷部が形成する開口部を閉じたことに特徴が
ある。これにより、電極の食い込みはさらに抑えること
ができる。In the current collector plate 26 shown in FIG. 3, the width e of the current collector plate shown in FIG. 2 is further narrowed to close the opening formed by the corrugated valley on the surface where the current collector plate contacts the electrodes. It is characterized by this. Thereby, the biting of the electrode can be further suppressed.
【００２２】図４は波形集電板の波の位相を一部ずらし
たことに特徴がある。図１に示す集電板において、ガス
は図中の矢印の方向に流れるが、ガスｃとガスｄは、流
路における集電板の開口部が異なるために、反応速度が
異なる場合がある。そのため、電池反応が均一に起こら
ず、電池性能を低下させる可能性がある。また、図３に
示す集電板においては、一方のガスは電極に触れずに流
れるため電池反応に寄与せず、ガスを有効に利用できな
い。そこで、ガスの流れ方向に複数回、波の位相をステ
ップ状にずらした。図中にはこの集電板27の一部とし
て、位相を一回だけずらしたものを示す。これにより、
図１に示すガスｃとガスｄとは、ガスの流れにともなっ
て混合することができ、電極平面内でより均質なガスを
得ることができる。その結果電池反応はより均一に生じ
る。図４の集電板は一枚の薄板より成形されているが、
図１ないし図３の集電板を位相をずらして、複数個並べ
ても同様な効果が得られる。FIG. 4 is characterized in that the phases of the waves on the corrugated current collector are partly shifted. In the current collector shown in FIG. 1, gas flows in the direction of the arrow in the figure, but gas c and gas d may have different reaction rates because the openings of the current collector in the flow path are different. Therefore, the battery reaction may not occur uniformly and the battery performance may be deteriorated. Further, in the current collector shown in FIG. 3, one gas flows without touching the electrodes, so that it does not contribute to the cell reaction and the gas cannot be effectively used. Therefore, the phase of the wave is stepwise shifted a plurality of times in the gas flow direction. In the figure, as a part of the current collector plate 27, the one whose phase is shifted only once is shown. This allows
The gas c and the gas d shown in FIG. 1 can be mixed with the flow of gas, and a more homogeneous gas can be obtained in the electrode plane. As a result, the cell reaction occurs more uniformly. The current collector plate of FIG. 4 is formed from a single thin plate,
The same effect can be obtained by arranging a plurality of the current collecting plates of FIGS. 1 to 3 out of phase with each other.
【００２３】図５は脚部に孔を設けた集電板である。図
１に示すガスｃとガスｄとは、この孔を通して、互いに
流通することができるので、ガスは常に混合し、図４に
示した集電板と同様な効果を得ることができる。FIG. 5 shows a current collector plate having holes in its legs. Since the gas c and the gas d shown in FIG. 1 can flow through each other through this hole, the gases are always mixed and the same effect as that of the current collector plate shown in FIG. 4 can be obtained.
【００２４】上述したような集電板を加工するには、剪
断打ち抜き加工や曲げ加工等、複数の機械加工を要する
ため、集電板の高さの管理が難しい。集電板は電極を均
等な圧力で支持するために高い高さ寸法精度が要求され
るので、高さのわずかなばらつきを吸収することができ
れば、より望ましい。そこで、上述した波形集電板のイ
ンターコネクタに接触する面を円弧状に成形した。その
集電板30を図６に示す。円弧状に成形した部分が平面状
に伸ばされることにより、わずかな高さの変化が可能で
ある。これにより、集電板の加工に高い精度を要求する
ことなく、電極を均等な圧力で支持することができ、コ
ストダウンを図ることができる。この円弧状の突出高さ
は50μｍから500 μｍが適当であった。さらに、加工精
度を向上させるためには、小さい集電板を複数個敷き並
べるのが効果的である。To process the current collector plate as described above, it is difficult to control the height of the current collector plate because a plurality of mechanical processes such as shear punching and bending are required. Since the current collector plate is required to have a high height dimensional accuracy in order to support the electrodes at a uniform pressure, it is more desirable if it can absorb a slight height variation. Therefore, the surface of the corrugated current collector plate that contacts the interconnector is formed in an arc shape. The current collector plate 30 is shown in FIG. A slight height change is possible by extending the arc-shaped portion in a flat shape. This makes it possible to support the electrodes with a uniform pressure without requiring high accuracy in processing the current collector plate, and thus to reduce costs. The appropriate arc-shaped protrusion height is 50 μm to 500 μm. Further, in order to improve the processing accuracy, it is effective to lay out a plurality of small current collector plates.
【００２５】[0025]
【発明の効果】本発明は上述したような構成の波形集電
板としたので、電極が集電板の開口部に食い込むことを
抑え、圧力損失を小さくし、より均一に電極から電気を
導き、より均一に電極を支持することができる。その結
果、溶融炭酸塩型燃料電池の性能を高めることができ
る。EFFECTS OF THE INVENTION Since the present invention is the corrugated current collector having the above-mentioned structure, it is possible to suppress the electrode from biting into the opening of the current collector, reduce the pressure loss, and lead the electricity from the electrode more uniformly. The electrode can be supported more uniformly. As a result, the performance of the molten carbonate fuel cell can be improved.
【図１】本発明の第１の実施例を示す斜視図FIG. 1 is a perspective view showing a first embodiment of the present invention.
【図２】本発明の第２の実施例を示す斜視図FIG. 2 is a perspective view showing a second embodiment of the present invention.
【図３】本発明の第３の実施例を示す斜視図FIG. 3 is a perspective view showing a third embodiment of the present invention.
【図４】本発明の第４の実施例を示す斜視図FIG. 4 is a perspective view showing a fourth embodiment of the present invention.
【図５】本発明の第５の実施例を示す斜視図FIG. 5 is a perspective view showing a fifth embodiment of the present invention.
【図６】本発明の第６の実施例を示す斜視図FIG. 6 is a perspective view showing a sixth embodiment of the present invention.
【図７】本発明における溶融炭酸塩型燃料電池を示す分
解斜視図FIG. 7 is an exploded perspective view showing a molten carbonate fuel cell according to the present invention.
【図８】本発明における溶融炭酸塩型燃料電池の断面図FIG. 8 is a sectional view of a molten carbonate fuel cell according to the present invention.
【図９】従来例の斜視図FIG. 9 is a perspective view of a conventional example.
【図１０】従来例の説明図FIG. 10 is an explanatory diagram of a conventional example.
１…単電池 ２…炭酸塩マトリックス ３…アノード
４…カソード ５…セパレータ ６…インターコネクタ
７…アノードエッジ板 ８…カソードエッジ板 ９…
アノード集電板 10…カソード集電板 11…燃料ガス
12…酸化剤ガス 13…マニホールドリンク 14…脚 20…集電板 21…肩
部 22…脚部 23…孔1 ... Single cell 2 ... Carbonate matrix 3 ... Anode
4 ... Cathode 5 ... Separator 6 ... Interconnector 7 ... Anode edge plate 8 ... Cathode edge plate 9 ...
Anode current collector 10 ... Cathode current collector 11 ... Fuel gas
12 ... Oxidant gas 13 ... Manifold link 14 ... Leg 20 ... Current collector 21 ... Shoulder 22 ... Leg 23 ... Hole
Claims (6)
ドとで挟んだ単電池と、そのアノードに燃料ガスを、カ
ソードに酸化剤ガスをそれぞれ隔てて導くセパレータと
を交互に積層して発電させるようにした溶融炭酸塩型燃
料電池において、セパレータ内にガス流路空間を確保す
るよう単電池間を支持しながら、アノードとカソードに
密着して隣合う単電池を電気的に直列に接続する集電板
を、波形状の薄板から形成して、波形の各山の頂部の幅
を麓部の幅よりも広く成形し、波形の各山の頂部に平面
部を設け、アノードあるいはカソードと密着する側の頂
部には薄板を貫通させて複数の孔を設けたことを特徴と
する溶融炭酸塩型燃料電池の集電板。1. A unit cell in which a carbonate matrix is sandwiched between an anode and a cathode and a separator for guiding a fuel gas to the anode and a separator for guiding an oxidant gas to the cathode are alternately laminated to generate electric power. In a molten carbonate fuel cell, a current collector plate that connects adjacent cells in close contact with the anode and cathode while electrically supporting them between cells so as to secure a gas flow path space inside the separator is provided. , Formed from a corrugated thin plate, the width of the crest of each corrugation is formed wider than the width of the foot, and a flat part is provided on the top of each corrugation of the corrugation so that the top that is in close contact with the anode or cathode A collector plate for a molten carbonate fuel cell, characterized in that a plurality of holes are provided through the thin plate.
の各山の頂部の幅を、密着しない側の各山の頂部の幅よ
りも広くしたことを特徴とする請求項１に記載の溶融炭
酸塩型燃料電池の集電板。2. The molten carbonate type according to claim 1, wherein the width of the top of each crest on the side that is in close contact with the anode or the cathode is made wider than the width of the top of each crest on the side that does not adhere. Fuel cell current collector.
の山の肩部を隣合う山同士で接触させたことを特徴とす
る請求項１又は請求項２に記載の溶融炭酸塩型燃料電池
の集電板。3. The current collector of the molten carbonate fuel cell according to claim 1 or 2, wherein the shoulders of the ridges that are in close contact with the anode or the cathode are brought into contact with adjacent ridges. Board.
せたことを特徴とする請求項１ないし請求項３に記載の
溶融炭酸塩型燃料電池の集電板。4. The current collector plate of the molten carbonate fuel cell according to claim 1, wherein the wave phase of the current collector plate is partially offset.
を設けたことを特徴とする請求項１ないし請求項４に記
載の溶融炭酸塩型燃料電池の集電板。5. The current collector plate for a molten carbonate fuel cell according to claim 1, wherein a hole is formed by penetrating the thin plate in the belly part of the mountain of the current collector plate.
側の山の頂部を山の高さ方向に円弧状に膨らませたこと
を特徴とする請求項１ないし請求項５に記載の溶融炭酸
塩型燃料電池の集電板。6. The molten carbonate fuel cell according to any one of claims 1 to 5, wherein the top of the mountain on the side that does not adhere to the anode or the cathode is expanded in an arc shape in the height direction of the mountain. Current collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6044600A JPH07254424A (en) | 1994-03-16 | 1994-03-16 | Collector plate for molten carbonate fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6044600A JPH07254424A (en) | 1994-03-16 | 1994-03-16 | Collector plate for molten carbonate fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07254424A true JPH07254424A (en) | 1995-10-03 |
Family
ID=12695954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6044600A Pending JPH07254424A (en) | 1994-03-16 | 1994-03-16 | Collector plate for molten carbonate fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07254424A (en) |
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|---|---|---|---|---|
| US5643690A (en) * | 1994-11-11 | 1997-07-01 | Kabushiki Kaisha Toshiba | Molten carbonate fuel cell |
| US6544681B2 (en) | 2000-12-26 | 2003-04-08 | Ballard Power Systems, Inc. | Corrugated flow field plate assembly for a fuel cell |
| JP2006294404A (en) * | 2005-04-11 | 2006-10-26 | Toyota Auto Body Co Ltd | Fuel cell separator |
| JP2006324084A (en) * | 2005-05-18 | 2006-11-30 | Hitachi Ltd | Fuel cell |
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| JP2007173163A (en) * | 2005-12-26 | 2007-07-05 | Honda Motor Co Ltd | Reaction gas humidifying device |
| JP2009277390A (en) * | 2008-05-12 | 2009-11-26 | Central Res Inst Of Electric Power Ind | Flow passage plate for fuel cell, and fuel cell using the same |
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| US7794863B2 (en) | 2004-01-22 | 2010-09-14 | Kabushikikaisha Equos Research | Fuel cell |
| US8039163B2 (en) | 2004-03-30 | 2011-10-18 | Kabushikikaisha Equos Research | Separator and fuel cell using that separator |
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| JP2006294404A (en) * | 2005-04-11 | 2006-10-26 | Toyota Auto Body Co Ltd | Fuel cell separator |
| JP2006324084A (en) * | 2005-05-18 | 2006-11-30 | Hitachi Ltd | Fuel cell |
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